---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 04/15/11: 18 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:22 AM - Re: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI (GRAHAM SINGLETON) 2. 01:45 AM - Re: Mono Landing Gear Question (David Joyce) 3. 02:21 AM - Re: Mono Landing Gear Question (Pete Lawless) 4. 02:36 AM - Mono landing gear question (Justin Kennedy) 5. 03:21 AM - Re: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI (Frans Veldman) 6. 03:49 AM - Re: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI (GRAHAM SINGLETON) 7. 04:47 AM - Re: Mono Landing Gear Question (Jim Brown) 8. 07:46 AM - Re: Mono Landing Gear Question (egp8111) 9. 08:22 AM - Upholstery (Steade) 10. 08:52 AM - Re: Upholstery (Peter Harrod) 11. 08:53 AM - Re: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI (ptag.dev@tiscali.co.uk) 12. 10:53 AM - Re: Mono Landing Gear Question (Martin Tuck) 13. 12:45 PM - Re: Mono Landing Gear Question (Jim Brown) 14. 12:45 PM - Re: Upholstery (graeme bird) 15. 02:51 PM - Re: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI (Bud Yerly) 16. 02:52 PM - Re: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI (Bud Yerly) 17. 03:32 PM - FW: Re: Mono Landing Gear Question (Carlton Pattinson) 18. 07:37 PM - Rubber Landing Gear Block (Martin Tuck) ________________________________ Message 1 _____________________________________ Time: 01:22:45 AM PST US From: GRAHAM SINGLETON Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI =0A=0A=0A=0A=0A________________________________=0AFrom: Bud Yerly =0ATo: europa-list@matronics.com=0ASent: Friday, 15 April, 2011 1: 18:37=0ASubject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATUR E DURING TAXI=0AHi Bud=0AI think the uneven mixture is a serious issue with the Jab6. If the inlet to the =0Acarb is curved the airspeed in the ventur i will not be equal across the whole =0Aarea so the spray of droplets will be uneven too. To a certain extent the same =0Athing happens with Rotax so the front cylinders get more fuel than the rear at =0Asome throttle setting s, drops of fuel don't turn corners the same as air =0Amolecules!=0ABoth en gines need fuel injection imho. Or a redesign of the induction system to =0Aget the fuel/air mixture properly dispersed before any splitting=0AGraha m =0A=0A=0AThe engine at cruise will die if the carb heat is pulled and the n the throttle =0Aretarded so we have a carburation issue still. It is ju st too lean it seems. =0AMany things may be at play. We'll investigate o ne at a time.=0A =0AShock cooling is a pain so the inlet has a dam on the front cylinders to help =0Aout, but it bears watching. We lazy Rotax peop le normally don't have to go to =0Athe cooling page of the EIS as part of our descent check, so make it part of =0Ayour crosscheck.=0A =0ATo our fri end in Argentina:=0AThanks to Johns Lawton's and the Jabiru crowd's researc h, the mixture per =0Acylinder has been identified as a problem in some of the stock engines. The =0Ainduction system we found is prone to small le aks which leans the cylinders and =0Acauses high EGT and CHT. We are pull ing the carb (again) to take out the owner =0Ainstalled lean kit. The smo oth bore inlet to the carb is a good idea, but =0Aplease ensure the hose c lamps and rubber and gasket parts in the induction are =0Asealing well. A lso, the induction hose must be able to hold its shape and =0Astill be fle xible enough to take engine movement. If that tube collapses your =0Aengi ne dies. My experience has been if your cylinders are running hot and the =0AEGT is high, fix the induction, by either fixing air leaks, jetting th e carb =0Adifferently or moving the mixture clip or both. I have not trie d rotating the =0Acarb off axis.=0A =0A=0ABud Yerly=0AStill recovering from Sun 'n Fun.=0A----- Original Message ----- =0A>From: AirEupora =0A>To: eur opa-list@matronics.com =0A>Sent: Tuesday, April 12, 2011 10:05 AM=0A>Sub ject: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAX l.net>=0A>=0A>I can not address this problem as I have not run my engine , but I was told by =0A>Jim McCormick to build a square box in front of the carburetor. I'll include =0A>a couple of pictures.=0A>=0A>=0A>=0A> =0A>Read this topic online here:=0A>=0A>http://forums.matronics.com/view topic.php?p=336709#336709=0A>=0A>=0A>=0A>=0A>Attachments: =0A>=0A>http:// fp; Features Chat, http://www.matronnbsp; via the Web =0A>title =http://forums.matronics.com/ =0A>href="http://forums.matronics.com" >http://forums.matronics.com=0A>_p; generous bsp; =0A>title=http://www.matronics.com/contribution =0A>href="http ://www.matronics.com/contribution">http://www.matronics.com/c==== ========= =0A ________________________________ Message 2 _____________________________________ Time: 01:45:23 AM PST US From: "David Joyce" Subject: Re: Europa-List: Mono Landing Gear Question Martin, Although Europa sell them (for 70+ as I remember it) there is a supply of spare U/C bits around (in the UK at least) from those who have converted their monos to trikes. Maybe you can find something similar in your neck of the woods. Incidentally all the 'rubber' blocks I have seen are black! Regards, David Joyce G-XSDJ ----- Original Message ----- From: "Martin Tuck" Sent: Friday, April 15, 2011 4:42 AM Subject: Europa-List: Mono Landing Gear Question > > When I replaced the brakes recently I thought the red rubber block (that > has the vee's cut in it) which forms part of the landing gear suspension > was looking a bit tired. I looked at some early photos of the aircraft and > sure enough the top of the tire seems to be inline with the bottom of the > fuselage whereas now the top of the tire is inside the wheel well by maybe > 1/2 inch or so and both outriggers touch the ground whereas the aircraft > used to tip from one to the other slightly. > > I assume I have to get a new block from Europa in the UK - but if it is > something I can get here I guess it makes sense to buy it here and save on > shipping costs. Same with the bungee cord which I might think about > replacing at the same time. > > Anyone have to replace their block yet - if so, where can you get one? How > about the bungee - what is the spec? > > I seem to recall someone coming up with an alternative solution to the > bungee but I can't recall what is was. I think it included some kind of > up-lock also. > > Any help would be appreciated. > > Regards, > Martin Tuck > N152MT > Wichita, Kansas > > > ________________________________ Message 3 _____________________________________ Time: 02:21:51 AM PST US From: "Pete Lawless" Subject: RE: Europa-List: Mono Landing Gear Question David The red block was the original as supplied with the early kits. The black one arrived as a replacement while I was still building. The red one gave the wrong sort of bounce or something. Cut on the diagonal the red block makes a great pair of chocks. Pete -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of David Joyce Sent: 15 April 2011 09:43 Subject: Re: Europa-List: Mono Landing Gear Question Martin, Although Europa sell them (for 70+ as I remember it) there is a supply of spare U/C bits around (in the UK at least) from those who have converted their monos to trikes. Maybe you can find something similar in your neck of the woods. Incidentally all the 'rubber' blocks I have seen are black! Regards, David Joyce G-XSDJ ----- Original Message ----- From: "Martin Tuck" Sent: Friday, April 15, 2011 4:42 AM Subject: Europa-List: Mono Landing Gear Question > > When I replaced the brakes recently I thought the red rubber block (that > has the vee's cut in it) which forms part of the landing gear suspension > was looking a bit tired. I looked at some early photos of the aircraft and > sure enough the top of the tire seems to be inline with the bottom of the > fuselage whereas now the top of the tire is inside the wheel well by maybe > 1/2 inch or so and both outriggers touch the ground whereas the aircraft > used to tip from one to the other slightly. > > I assume I have to get a new block from Europa in the UK - but if it is > something I can get here I guess it makes sense to buy it here and save on > shipping costs. Same with the bungee cord which I might think about > replacing at the same time. > > Anyone have to replace their block yet - if so, where can you get one? How > about the bungee - what is the spec? > > I seem to recall someone coming up with an alternative solution to the > bungee but I can't recall what is was. I think it included some kind of > up-lock also. > > Any help would be appreciated. > > Regards, > Martin Tuck > N152MT > Wichita, Kansas > > > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 4 _____________________________________ Time: 02:36:23 AM PST US From: Justin Kennedy Subject: Europa-List: Mono landing gear question Hi Martin, I was at LAA Sywell Rally last year and the subject of landing gear blocks came up. It transpired that most of the mono guys had black blocks. Now min e is red, like yours, so I contacted Europa and apparently the red block wa s superseded by the black one some time ago. My permit inspection next week so I will be fitting the new black block thi s weekend. I am of course hoping that it will transform the aircraft into a docile puppy on landing however I fear it won't make a huge difference. I will let you know if I notice any difference. I have just fitted a Trio ProPilot this winter so I can't wait to get flyin g again. Justin G-ZTED Europa Classic Monwheel 912ULS Airmaster A332 ________________________________ Message 5 _____________________________________ Time: 03:21:25 AM PST US From: Frans Veldman Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI On 04/15/2011 10:17 AM, GRAHAM SINGLETON wrote: > To a certain extent the same thing happens with Rotax so the front > cylinders get more fuel than the rear at some throttle settings, drops > of fuel don't turn corners the same as air molecules! I believe the "problem" with the Rotax is of a different nature. There are two carbs, and the inlet pulses are not equally distributed. Each carb will see two inlet pulses in sequence, then followed by a long pause when the cylinders on the other side (fed by the other carb) have their respective inlet pulses. After the pause, the flow of fuel inside the nozzles is stalled. With the first cylinder breathing, the fuel has to start moving again, and the second cylinder has the benefit that the fuel is already up to speed. So the second cylinder in the sequence receives a slightly richer mixture. A solution can be to use a bigger bore balance tube. Some Italian company is selling a pair of manifolds and balance tube for this purpose, and the manifolds have already the bosses in them to mount fuel injectors for future upgrades (and using the carbs as fuelless throttle bodies and backup in case the EFI fails). Ok,the subject was "Jabiru". To keep it in the subject: After the long list of problems and disadvantages, can anybody enlighten me what the benefit is of the Jab over the Rotax? (I assume there must be one, why else would anyone bother to install one?) Frans ________________________________ Message 6 _____________________________________ Time: 03:49:32 AM PST US From: GRAHAM SINGLETON Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI Frans=0AI think you are right, much more logical conclusions than mine !:-) =0AAgree about the Jabiru also, sad but geared and liquid cooled will alway s have a =0Aperformance advantage. More complication too of course but a mo re sensible =0Acompromise I think.=0Aregards=0AGraham=0A=0A=0A=0A=0A_______ _________________________=0AFrom: Frans Veldman =0A ject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING epilots.nl>=0A=0AOn 04/15/2011 10:17 AM, GRAHAM SINGLETON wrote:=0A=0A> To a certain extent the same thing happens with Rotax so the front=0A> cylinde rs get more fuel than the rear at some throttle settings, drops=0A> of fuel don't turn corners the same as air molecules!=0A=0AI believe the "problem" with the Rotax is of a different nature. There=0Aare two carbs, and the in let pulses are not equally distributed. Each=0Acarb will see two inlet puls es in sequence, then followed by a long=0Apause when the cylinders on the o ther side (fed by the other carb) have=0Atheir respective inlet pulses.=0AA fter the pause, the flow of fuel inside the nozzles is stalled. With=0Athe first cylinder breathing, the fuel has to start moving again, and=0Athe sec ond cylinder has the benefit that the fuel is already up to=0Aspeed. So the second cylinder in the sequence receives a slightly richer=0Amixture.=0AA solution can be to use a bigger bore balance tube. Some Italian=0Acompany i s selling a pair of manifolds and balance tube for this=0Apurpose, and the manifolds have already the bosses in them to mount fuel=0Ainjectors for fut ure upgrades (and using the carbs as fuelless throttle=0Abodies and backup in case the EFI fails).=0A=0AOk,the subject was "Jabiru". To keep it in the subject: After the long=0Alist of problems and disadvantages, can anybody enlighten me what the=0Abenefit is of the Jab over the Rotax? (I assume the re must be one, why=0Aelse would anyone bother to install one?)=0A=0AFrans ================= ________________________________ Message 7 _____________________________________ Time: 04:47:07 AM PST US From: Jim Brown Subject: Re: Europa-List: Mono Landing Gear Question Martin, I just completed replacement of the rubber block, (black),-bungee cord, =0Aand all of the bronze bushing in my plane..I used 3/8 inch bungee cord from =0Aaircraft spruce. I purchased 30 feet of cord. and used about 25 feet.-You- will =0Aneed the extra length to have something to hold o nto while you are wraping the =0Acord around the frame.=0A-You can tell i f the bungee cord needs replacing by how hard it is to retract =0Athe gear. ..-My original bungee cord had 7-wrap's around the frame.and so-I =0A replace with same number.-My gear had reached the point that it took a ha rd push =0Ato get gear retracted.. I have 850. hours on the original setup. and 10 years =0Atime in service.. I also replaced all of the bronze bushing s while I had the =0Agear laying on the hanger floor.=0A=0AThe rebuild made a big difference in the gear retraction cycle, airframe set up =0Ahigher, much easier to retract the gear. You will probably need to extend the =0Aou triggers. Buy new nylon replacement at Aircraft Spruce.. They have it in =0Avarious diameters. You need- the one and a quarter inch in diameter si ze..check =0Ayours to make certain...They sell it by the foot....=0A=0AI ha ve pictures of the whole operation, if you need to see.....=0A=0AJim Brown =0A=0A=0A________________________________=0AFrom: Martin Tuck =0ATo: Europa Builders Forum =0ASent: Thu, Ap ril 14, 2011 11:42:03 PM=0ASubject: Europa-List: Mono Landing Gear Question When I replaced the brakes recently I thought the red rubber block (that ha s the =0Avee's cut in it) which forms part of the landing gear suspension w as looking a =0Abit tired. I looked at some early photos of the aircraft an d sure enough the top =0Aof the tire seems to be inline with the bottom of the fuselage whereas now the =0Atop of the tire is inside the wheel well by maybe 1/2 inch or so and both =0Aoutriggers touch the ground whereas the a ircraft used to tip from one to the =0Aother slightly.=0A=0AI assume I have to get a new block from Europa in the UK - but if it is =0Asomething I can get here I guess it makes sense to buy it here and save on =0Ashipping cos ts. Same with the bungee cord which I might think about replacing at =0Athe same time.=0A=0AAnyone have to replace their block yet - if so, where can you get one? How about =0Athe bungee - what is the spec?=0A=0AI seem to rec all someone coming up with an alternative solution to the bungee =0Abut I c an't recall what is was.- I think it included some kind of up-lock also. =0A=0AAny help would be appreciated.=0A=0ARegards,=0AMartin Tuck=0AN152MT ==================== ________________________________ Message 8 _____________________________________ Time: 07:46:11 AM PST US Subject: Europa-List: Re: Mono Landing Gear Question From: "egp8111" timely post ! I just bought back the Europa I built 15 yrs. ago (long story) and when I got it home I wondered what that red stuff was that was falling out of the gear well. Yep, the old rubber block ! Anyone with one on these they are using for a door stop or whatever please PM me. thanks, E. G. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=337010#337010 ________________________________ Message 9 _____________________________________ Time: 08:22:22 AM PST US From: "Steade" Subject: Europa-List: Upholstery Hi All I've Just got to the position where I seriously have to make a decision regarding upholstery for my XS trigear. I'm looking to use fabric rather than leather but apart from that then I am fairly flexible. I would appreciate any UK contacts other subscribers can pass on either for a complete job done out of for a good quality kit that I can install myself. Regards David Steade ________________________________ Message 10 ____________________________________ Time: 08:52:20 AM PST US Subject: Re: Europa-List: Upholstery From: Peter Harrod David, Advert in Sept 2009 Europa Flyer for tailored and contoured trim kits as featured on "a plane is born" phone Matt on 01872 573685 or 07895 182584. I am not ready for trim myself yet .. regards Peter. ________________________________ Message 11 ____________________________________ Time: 08:53:57 AM PST US From: "ptag.dev@tiscali.co.uk" Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI Hi! Frans, Graham /all With comments about the Jabiru you are subjecting me to a nightmare !!!!!!!!!!!! don't tempt me ! Regards Bob Harrison G_PTAG >----Original Message---- >From: grahamsingleton@btinternet.com >Date: 15/04/2011 11:46 >To: >Subj: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI > >Frans >I think you are right, much more logical conclusions than mine !:-) >Agree about the Jabiru also, sad but geared and liquid cooled will always have a >performance advantage. More complication too of course but a more sensible >compromise I think. >regards >Graham > > > > >________________________________ >From: Frans Veldman >To: europa-list@matronics.com >Sent: Friday, 15 April, 2011 11:17:12 >Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING >TAXI > nl> > >On 04/15/2011 10:17 AM, GRAHAM SINGLETON wrote: > >> To a certain extent the same thing happens with Rotax so the front >> cylinders get more fuel than the rear at some throttle settings, drops >> of fuel don't turn corners the same as air molecules! > >I believe the "problem" with the Rotax is of a different nature. There >are two carbs, and the inlet pulses are not equally distributed. Each >carb will see two inlet pulses in sequence, then followed by a long >pause when the cylinders on the other side (fed by the other carb) have >their respective inlet pulses. >After the pause, the flow of fuel inside the nozzles is stalled. With >the first cylinder breathing, the fuel has to start moving again, and >the second cylinder has the benefit that the fuel is already up to >speed. So the second cylinder in the sequence receives a slightly richer >mixture. >A solution can be to use a bigger bore balance tube. Some Italian >company is selling a pair of manifolds and balance tube for this >purpose, and the manifolds have already the bosses in them to mount fuel >injectors for future upgrades (and using the carbs as fuelless throttle >bodies and backup in case the EFI fails). > >Ok,the subject was "Jabiru". To keep it in the subject: After the long >list of problems and disadvantages, can anybody enlighten me what the >benefit is of the Jab over the Rotax? (I assume there must be one, why >else would anyone bother to install one?) > >Frans================= ________________________________ Message 12 ____________________________________ Time: 10:53:37 AM PST US From: Martin Tuck Subject: Re: Europa-List: Mono Landing Gear Question Hi Jim, Thanks as always for your response. I would like to see your photos yes. I'm particularly interested in your method of lifting (and keeping) the aircraft up such that you can work on the gear. Where did you get the (seems like black is the standard now) block? Someone claimed Europa wanted UKL70 for it - which I find hard to believe! I assume you no longer have to cut a couple of V's in it to make it less bouncy? Regards, Martin On 4/15/2011 6:44 AM, Jim Brown wrote: > Martin, I just completed replacement of the rubber block, > (black), bungee cord, and all of the bronze bushing in my plane..I > used 3/8 inch bungee cord from aircraft spruce. I purchased 30 feet of > cord. and used about 25 feet. You will need the extra length to have > something to hold onto while you are wraping the cord around the frame. > You can tell if the bungee cord needs replacing by how hard it is to > retract the gear... My original bungee cord had 7 wrap's around the > frame.and so I replace with same number. My gear had reached the point > that it took a hard push to get gear retracted.. I have 850. hours on > the original setup.and 10 years time in service.. I also replaced all > of the bronze bushings while I had the gear laying on the hanger floor. > The rebuild made a big difference in the gear retraction cycle, > airframe set up higher, much easier to retract the gear. You will > probably need to extend the outriggers. Buy new nylon replacement at > Aircraft Spruce.. They have it in various diameters. You need the one > and a quarter inch in diameter size..check yours to make > certain...They sell it by the foot.... > I have pictures of the whole operation, if you need to see..... > Jim Brown > > ** ________________________________ Message 13 ____________________________________ Time: 12:45:15 PM PST US From: Jim Brown Subject: Re: Europa-List: Mono Landing Gear Question Martin;=0A=0AI got the rubber block several years ago...from someone who ha d decided to build =0Athe tri-gear. I would contact Bud Yearly, he has done several conversions from =0Athe mono-wheel to a tri-gear... He may have on e from-a-conversion........=0A=0AThe bushings are american size, not me tric. They fit AN bolts..I found mine at a =0Ahardware store......They are just bronze bushing,=0A=0AAttached are pics of the conversion...I can tell you for certain that it is a =0Adirty, dirty, job........make friends with your wife, before you- give her the =0Aold dirty clothes.........=0A=0AI will send the pictures in two different groups.=0A=0A=0A___________________ _____________=0AFrom: Martin Tuck =0ATo: europa-list@matron ics.com=0ASent: Fri, April 15, 2011 1:49:57 PM=0ASubject: Re: Europa-List: Mono Landing Gear Question=0A=0AHi Jim,=0A=0AThanks as always for your resp onse. I would like to see your photos yes. I'm =0Aparticularly interested i n your method of lifting (and keeping) the aircraft up =0Asuch that you can work on the gear.=0A=0AWhere did you get the (seems like black is the stan dard now) block? Someone =0Aclaimed Europa wanted UKL70 for it - which I fi nd hard to believe! I assume you =0Ano longer have to cut a couple of V's i n it to make it less bouncy?=0A=0ARegards,=0AMartin=0A=0AOn 4/15/2011 6:44 AM, Jim Brown wrote: =0AMartin, I just completed replacement of the rubber block, (black),-bungee cord, =0Aand all of the bronze bushing in my plane ..I used 3/8 inch bungee cord from =0Aaircraft spruce. I purchased 30 feet of cord. and used about 25 feet.-You- will =0Aneed the extra length to have something to hold onto while you are wraping the =0Acord around the fr ame.=0A>-You can tell if the bungee cord needs replacing by how hard it i s to retract =0A>the gear...-My original bungee cord had 7-wrap's aroun d the frame.and so-I =0A>replace with same number.-My gear had reached the point that it took a hard push =0A>to get gear retracted.. I have 850. hours on the original setup.and 10 years =0A>time in service.. I also repla ced all of the bronze bushings while I had the =0A>gear laying on the hange r floor.=0A>=0A>The rebuild made a big difference in the gear retraction cy cle, airframe set up =0A>higher, much easier to retract the gear. You will probably need to extend the =0A>outriggers. Buy new nylon replacement at Ai rcraft Spruce.. They have it in =0A>various diameters. You need- the one and a quarter inch in diameter size..check =0A>yours to make certain...They sell it by the foot....=0A>=0A>I have pictures of the whole operation, if ============= =0A ________________________________ Message 14 ____________________________________ Time: 12:45:17 PM PST US Subject: Europa-List: Re: Upholstery From: "graeme bird" The Mrs has just done my seats using plain material from IKEA. I decided to do something simple initially so I could see what I needed after flying it a while. I used a retangular 2" firm foam with 1" memory foam on top for the seat and 2" memory foam for the backs shaped to match the headrest. I used rectangular on both. -------- Graeme Bird G-UMPY Mono Classic/XS FWFD 912ULS/Warp drive FP Build nearing completion Read this topic online here: http://forums.matronics.com/viewtopic.php?p=337047#337047 ________________________________ Message 15 ____________________________________ Time: 02:51:42 PM PST US From: "Bud Yerly" Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI You bet. Bud ----- Original Message ----- From: GRAHAM SINGLETON To: europa-list@matronics.com Sent: Friday, April 15, 2011 4:17 AM Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI ------------------------------------------------------------------------- ----- From: Bud Yerly > To: europa-list@matronics.com Sent: Friday, 15 April, 2011 1:18:37 Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI Hi Bud I think the uneven mixture is a serious issue with the Jab6. If the inlet to the carb is curved the airspeed in the venturi will not be equal across the whole area so the spray of droplets will be uneven too. To a certain extent the same thing happens with Rotax so the front cylinders get more fuel than the rear at some throttle settings, drops of fuel don't turn corners the same as air molecules! Both engines need fuel injection imho. Or a redesign of the induction system to get the fuel/air mixture properly dispersed before any splitting Graham The engine at cruise will die if the carb heat is pulled and then the throttle retarded so we have a carburation issue still. It is just too lean it seems. Many things may be at play. We'll investigate one at a time. Shock cooling is a pain so the inlet has a dam on the front cylinders to help out, but it bears watching. We lazy Rotax people normally don't have to go to the cooling page of the EIS as part of our descent check, so make it part of your crosscheck. To our friend in Argentina: Thanks to Johns Lawton's and the Jabiru crowd's research, the mixture per cylinder has been identified as a problem in some of the stock engines. The induction system we found is prone to small leaks which leans the cylinders and causes high EGT and CHT. We are pulling the carb (again) to take out the owner installed lean kit. The smooth bore inlet to the carb is a good idea, but please ensure the hose clamps and rubber and gasket parts in the induction are sealing well. Also, the induction hose must be able to hold its shape and still be flexible enough to take engine movement. If that tube collapses your engine dies. My experience has been if your cylinders are running hot and the EGT is high, fix the induction, by either fixing air leaks, jetting the carb differently or moving the mixture clip or both. I have not tried rotating the carb off axis. Bud Yerly Still recovering from Sun 'n Fun. ----- Original Message ----- From: AirEupora To: europa-list@matronics.com Sent: Tuesday, April 12, 2011 10:05 AM Subject: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI > I can not address this problem as I have not run my engine, but I was told by Jim McCormick to build a square box in front of the carburetor. I'll include a couple of pictures. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=336709#336709 Attachments: http://fp; Features Chat, http://www.matro nnbsp; via the Web title=http://forums.matronics.com/ href="http://forums.matronics.com">http://forums.matronics.com _p; generous bsp; title=http://www.matronics.com/contribution href="http://www.matronics.com/contribution">http://www.matronics.com/c ================ http://www.matro=================== http://www.matronics.com/Navigator?Europa-List http://www.matronics.com/contribution ________________________________ Message 16 ____________________________________ Time: 02:52:22 PM PST US From: "Bud Yerly" Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI I had thought I was the only one with sleepless nights. Bud ----- Original Message ----- From: ptag.dev@tiscali.co.uk To: europa-list@matronics.com Sent: Friday, April 15, 2011 11:51 AM Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI "ptag.dev@tiscali.co.uk" > Hi! Frans, Graham /all With comments about the Jabiru you are subjecting me to a nightmare !!!!!!!!!!!! don't tempt me ! Regards Bob Harrison G_PTAG >----Original Message---- >From: grahamsingleton@btinternet.com >Date: 15/04/2011 11:46 >To: > >Subj: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING TAXI > >Frans >I think you are right, much more logical conclusions than mine !:-) >Agree about the Jabiru also, sad but geared and liquid cooled will always have a >performance advantage. More complication too of course but a more sensible >compromise I think. >regards >Graham > > > > >________________________________ >From: Frans Veldman > >To: europa-list@matronics.com >Sent: Friday, 15 April, 2011 11:17:12 >Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE DURING >TAXI > . nl> > >On 04/15/2011 10:17 AM, GRAHAM SINGLETON wrote: > >> To a certain extent the same thing happens with Rotax so the front >> cylinders get more fuel than the rear at some throttle settings, drops >> of fuel don't turn corners the same as air molecules! > >I believe the "problem" with the Rotax is of a different nature. There >are two carbs, and the inlet pulses are not equally distributed. Each >carb will see two inlet pulses in sequence, then followed by a long >pause when the cylinders on the other side (fed by the other carb) have >their respective inlet pulses. >After the pause, the flow of fuel inside the nozzles is stalled. With >the first cylinder breathing, the fuel has to start moving again, and >the second cylinder has the benefit that the fuel is already up to >speed. So the second cylinder in the sequence receives a slightly richer >mixture. >A solution can be to use a bigger bore balance tube. Some Italian >company is selling a pair of manifolds and balance tube for this >purpose, and the manifolds have already the bosses in them to mount fuel >injectors for future upgrades (and using the carbs as fuelless throttle >bodies and backup in case the EFI fails). > >Ok,the subject was "Jabiru". To keep it in the subject: After the long >list of problems and disadvantages, can anybody enlighten me what the >benefit is of the Jab over the Rotax? (I assume there must be one, why >else would anyone bother to install one?) > >Frans================= http://www.matronics.com/Navigator?Europa-List http://www.matronics.com/contribution ________________________________ Message 17 ____________________________________ Time: 03:32:17 PM PST US From: Carlton Pattinson Subject: FW: Re: Europa-List: Mono Landing Gear Question We changed the block from red to black a year ago with no noticeable differ ence to the landing characteristics. Would also suggest that the shock absorbers are replaced when you change th e rubber block. Also it is worth removing the bearing end caps on the undercarriage swingin g arm to check there is no corrosion on the frame itself. This is usually t he main culprit when raising the undercarriage becomes difficult (ie: rust/ corrosion). Its easy to do this even when the whole undercarriage is assem bled (ie: with the bungee cords in place - in fact this makes it easier as the bungee supports the swinging arm). Carl & Dot G-LABS ============== Message Received: Apr 15 2011, 12:50 PM From: "Jim Brown" Cc: Subject: Re: Europa-List: Mono Landing Gear Question Martin, I just completed replacement of the rubber block, (black), bungee c ord, and all of the bronze bushing in my plane..I used 3/8 inch bungee cord from aircraft spruce. I purchased 30 feet of cord. and used about 25 feet. You will need the extra length to have something to hold onto while you ar e wraping the cord around the frame. You can tell if the bungee cord needs replacing by how hard it is to retract the gear... My original bungee cord had 7 wrap's around the frame.and so I replace with same number. My gear ha d reached the point that it took a hard push to get gear retracted.. I have 850. hours on the original setup.and 10 years time in service.. I also rep laced all of the bronze bushings while I had the gear laying on the hanger floor.The rebuild made a big difference in the gear retraction cycle, airfr ame set up higher, much easier to retract the gear. You will probably need to extend the outriggers. Buy new nylon replacement at Aircraft Spruce.. Th ey have it in various diameters. You need the one and a quarter inch in dia meter size..check yours to make certain...They sell it by the foot....I hav e pictures of the whole operation, if you need to see.....Jim Brown From: Martin Tuck Sent: Thu, April 14, 2011 11:42:03 PM Subject: Europa-List: Mono Landing Gear Question When I replaced the brakes recently I thought the red rubber block (that ha s the vee's cut in it) which forms part of the landing gear suspension was looking a bit tired. I looked at some early photos of the aircraft and sure enough the top of the tire seems to be inline with the bottom of the fusel age whereas now the top of the tire is inside the wheel well by maybe 1/2 i nch or so and both outriggers touch the ground whereas the aircraft used to tip from one to the other slightly. I assume I have to get a new block from Europa in the UK - but if it is som ething I can get here I guess it makes sense to buy it here and save on shi pping costs. Same with the bungee cord which I might think about replacing at the same time. Anyone have to replace their block yet - if so, where can you get one? How about the bungee - what is the spec? I seem to recall someone coming up with an alternative solution to the bung ee but I can't recall what is was. I think it included some kind of up-lock also. Any help would be appreciated. Regards, Martin Tuck == ________________________________ Message 18 ____________________________________ Time: 07:37:44 PM PST US From: Martin Tuck Subject: Europa-List: Rubber Landing Gear Block Thanks for all the responses - it seems the red rubber compression block (which you fashioned yourself to the right shape) was replaced by a pre-molded black rubber version. A new one seems to be around $100 - wow! I would be grateful if anyone has a spare laying around you don't need - maybe you converted your mono into a tri-gear - and doesn't mind parting with it could contact me. Many thanks, Martin ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.